Mainsail reefing systems must operate effciently to reduce sail under adverse conditions and provide proper sail shape when reefed. These systems are a must for both racers and cruisers.

Typical Boat Length:
Small Boat: 22' - 28' (6.7 - 8.5 m)
Midrange: 29' - 34' (8.8 - 10.4 m)
Big Boat: 35' - 42' (10.7 - 12.8 m)

Single Line

The single line reefing kit is easy to install and use. To reef, simply ease the halyard to a predetermined mark and pull the single reef line taut. Ideal for boats from 22 ft to 27 ft (6.7 m to 8.2 m) with a maximum sail area of 150 ft2 (14 m2).

Diagram Ref.	Description	Small Boat Part No.	Midrange Part No.	Big Boat Part No.
A	Single line reefing	430	430

Dual Line

This dual-line system is common on boats 30 ft (9 m) and larger. Position blocks so line pulls down and out to keep the sail flat and prevent lateral loads on the luff rope or luff sliders.

Diagram Ref.	Description	Small Boat Part No.	Midrange Part No.	Big Boat Part No.
A	Cheek	350 2644	2644 2606	2606 1963 1548
B	Single	348 2650	2650 2600	2600 1950 1540
C	Mastbase block	096 222 206	1986 1988	1988 1990
D	Bullseye	339 237	339 237	237

Lazy Jacks

Lazy Jacks contain mainsails during reefing and dousing. They work exceptionally well with full-battened mains, but are also used with conventional sails.

Diagram Ref.	Description	Small Boat Part No.	Midrange Part No.	Big Boat Part No.
A	Lazy Jack Kit	252	253	254

Mainsail Reefing systems

Single Line

Dual Line

Lazy Jacks